Ultimately I'm trying to create a USB installer with macOS Sierra 10.12 so I can install Sierra on a 2010 MacBook.
My MacBook is running Big Sur, and I heard I need to extract/create the USB installer inside a VMware Fusion VM.
I've been able to create a new VM by File > New and dragging the Catalina dmg into the File > New window. I believe this sets the Catalina file as the CD-ROM for the VM.
However, in a Catalina VM I'm having trouble extracting the Sierra dmg to make a bootable USB from, so I thought I should simply create a VM from Sierra directly.
In VMware Fusion File > New, if I drag the Sierra dmg into the File > New window, it is set as the CD-ROM, but when running the VM it doesn't boot from the CD-ROM, so I can't install Sierra in that VM. When I create the VM, I make sure to set the OS version as 10.12 but that doesn't fix the issue.
How do I create a Sierra 10.12 VM from the dmg file please (when my host is Big Sur)?
Help appreciated.
